Traction-engine



(No Modl.) I. F. LANDIS.

TRAGTION'ENGINE. No. 355,939. Patented Jan'. 11', 1887..

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@Nimah Similis FArnNr @rencia y FRANK F. LANDis, or vvAYNEsBoRoUGH,PENNSYLVANIA.

TRACTeoN-ENGINE.

SPECIFICATION forming part of Letters Patent No. 355,939, dated January11,1857.

Application nica Api-1i si, isst.

Serial No. 200,252. (No model.)

.To all whom t may concern,.-

Be it known that I, FRANK F. LANDIs, a citizen of the United States,residing at Vaynesborough, in the county ofFranklin and State ofPennsylvania, have invented certain new and useful Improvements inTraction-Engines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

This invention relates particularly to the construction of the mastergear-wheel and its connections with theframe; and the objects of myimprovement are to give to the master-gear a very large bearing-surface,to have its gearteeth always well oiled, and to have itsbearing-surfaces and gears well protected from dust. I accomplish theseobjects by the construction illustrated in the accompanying drawings, inwhich- Figure 1 is arear view of a traction-engine provided with amaster gear-wheel and connections constructed in accordance with myVinvention. Fig. 2 is a side view, partly in section, of a mastergearfwheel and its connections with a tractionengine, having one of itstraction-wheels in a dotted outline. Fig. 3 represents a portion of themaster-wheel connected in a modified manner with the housing and aportion of one of the traction-wheels of the engine.

Similar letters referto similar parts through ont the several views.

A represents the rear portion of the boiler, B the traction-wheels, andC the axle thereof. Upon the sills G are secured the housings or thepart of the frame represented at D, and to the side of said housings isattached a plate, E', having laterally a circular ange, E, the interiorof which is turned true to receive the peripheral edge of themaster-gear F. I stated that the plate carrying the iiange E is attachedto the housings. This is simply to facilitate the renewal of thebearing-ange; but it may be made integral with said housings, and isthus shown at E in Fig. 3;

The Inaster-gear F is simply a cogged rim, having its sides andperiphery or outer end of the teeth turned true to form a journal whichits into the interior of the circular ange or case E. The master-gear isthus made without ahub and arms or spider, and consequently lighter thanheretofore. To retain the master-gear in proper central position uponits re- 'taining-iiange E, an annular iiat plate or holtioirwheel, orwith the mechanism between them, it is provided, as shown in Figs. 1 and2, with lugs c, transversely carrying a pin, e, that passes through oneend of the 'link L,and through the opposite end of said link passesapin,1',projecting from one side of a gimbal-ring, 1, and from theopposite side of said gimbalring, at a point ninety degrees from thepins i, (four pins being nsed,) are lugs or pins i2, that pass throughone end of links K, and the opposite ends of saidlinks pass through lugsM on the periphery of the center Wheel of a compensating gear,H,connected with the tractionwvheel.

The above-described mode ofsupporting and revolving a gear-Wheel uponits periphery may not seem the best; but in practice it shows goodresults, especially as the resistance to said wheel is connectedtherewith at two opposite points on the inside of the rim. There is butlittle resistance upon the bearing-surfaces between the wheel F and thecase E, except the weight of said wheel and the resistance due to thethrust of cog-wheels meshing together.

Although Iprefer to have the compensating gear upon the main axle, asthe parts can be madeY larger, the compensating gear may be upontheeounterfshaft nearly on top of the boiler, as shown in Patent No.266,698, granted to me October' 31, 1882. The traction-wheel can then becloser to the master-gear and be connected thereto by six coiled orrubber springs, one' end of which bears against lugs projecting from.the traction-wheel and the other against lugs projecting from themastergear, and thus carry the entire weight of the rear end of theengine, and the springs N under the aXle may be dispensed with, and thebearings P and guides in the housings would only serve to keep the axleand allow it to play in a vertical plane.

In place of having the housings provided with a lateral iiange, E,encircling the periphery or the ends of the cogs of the master-gear, theange E may, as shown in Fig. 3, enter a circular groove cut in the sideof the master- ICO gear, and the latter be entirely or partly supportedby said ange.

Although I prefer to make the master-gear Without spokes, so as to belighter, it may have spokes united to a hub having a large centralopening, through Which the axle may play up and down. y

Having now fully described my invention, I claim- Y l. Inatraction-engine, the combination of a traction-wheel, a spokelessmaster-gear, and mechanism to yieldingly connect said traction- Wheeland gear with the frameor housings of said engine, and a flangeprojecting fromvsaid E. E. MAssoN, E. G. VURDEWAN.

with the frame or housings of said engine,an`d 2o

